Shaft-coupling.



G. J. BLUM.. SHAFT G'OUPLING. APPLIQATION FILED JULI s, 1912.

Patented Apr. 21, 1914.

All l Ll* FIQQ. George J @MQQMQ UNITED STATES" PATENT omen.

'GEORGE J. iamjivi. orjcmoaeoj- Irirliliirore essie-.non 1ro AnMsraoNq-nnmir TUBING COMEANIOF CHICMHJ,` IIiIfINoIsA coaroaa'rion or immersi# V snaar-coerente; 'l

Loessae.

I l f y specnicatioaofietiefsraten; t applicati@ ai'a July e', i912. 1 serial ivo. 767,41

T all whom t may concern:

Be it knovvn that l, GEORGE J. "BLUM, a citizen of the United States7 residing at Chicago, iii the county of Cook and State 'of Illinois,. have invented certain A11eiv.= and use- 1 ful Improvements in Sliaft-Gouplings, of which the following is` aspecilication.

rI"his .invention relates to improvements'in shaft couplings, 'andis shown applied to a universal j oin't, and has -or its object to proj vide improved means for connecting a-sha'ft va conpling shank 6. The arms 4L are adapted 'to any adjacent part so that it may be readily disconnected when desired, and so as'to prevent any twisting tendency of the couplint;'members relative to each other.

In the accompanying draw-ings', Figure l is a side view of a device Which embodies the features of my-invention. 'Fig; 2 is a transverse centra-l sectionof the same. Fig.

3 is asection on the line 3V of 'Fig'. 1; and

Fig. 4 is a perspective view. of a cross linkused in the joint. v i

Theor-oss link l of thejoint hasits jonrnais 2 supported inubushinglbearings 3.

These bearings are rmly fixed inthe. arms: lof theyoke links. The' ordinary integral.` yoke or U-links of universal joints areA re? placed in this invention by split links, each composed-of tivo members 5, each of the members having an oi'set or yok'earm 4 and to support the bushing bearings 3, and the shanks 6' of each pair are adapted to inclose the shaft to be connected to joint. l

The bearings 3 may be formed in any suit able manner. Herein fI have lshown them the universal formed out of sheet metal Which may loe drawn or spun into proper shape. rThe outer ends 7 of the bearings are imperlorate so as to inclosethe end of the journalsand thus prevent dust and the like from-Work# ing into the bearing and prevent greaseor oil from escaping outwardly. 1 The inner ends. of the bearings. are provided Witl1 an-. nnlar flanges 8. rlhese flanges are adaptedto fit iny annular` grooves@ formed in the hub of the cross -lin'k adjacent to the'inner end of the journals thereof; thus preventincgfv .escape of the ,Boil from the inner ends of the bearings These flanges' fitted in the' grooves also prevent dust andy otherjlforelgn;A

substances Working into' the bearings.l They also'nreventoutivard mvementof thebear v l `.tions being v recessed atdiainetrically oppoings. and strengthen the joint.

.Thegcross .iis-k is' 'paridad .with passagepassageways. each havingy conical outer' en -cls1,-v

11.-' When -"the oint is 'assembled' these pas-` sagevvays' are flledivith' oil orvgrease and "as the joint rotates. the greaseffworksjdnt wardlyinto. the bearings-and maintains proper lubricatinglilrns onfthesnrfacesof' the journals and bearings.'

yoke 'links conform` to the surfaces olf'4 the, shafts A to which the-joint is to be coupled.

.lhen assembled tina-ieShanks` -6 inclose .,the

shaft, and they are held'rmly infplac'eiby f' 65 The innerr surfaces of the Shanks 6 'of they means of sleeves 12. `The outer. surfaces of the Shanks when in place taper slightly i away from the joint` and the' inner surface of the sleeve tapers similarly, so that a' 1 To prevent rotation of theshaft in the memff -bers- 6 a keylzlis provided. The'keylpasses through recesses V14 formed-in the' adjacent edges of thesnanks .dandinto 'depressionsjJ l5 in the shaft.- .In orderto'- insure fthe Shanks pressing closely 'against the shaft",

and'also to make allowance for slight varia-4 r' tions -inlz the .size of the shafts, -the edges of the Shanks do not 'come yin contact.

Hence,v to prevent a twisting tendency of the yoke members relativevto.eachotherwhen the key, as the shaftfrotates, presses on one- .memberand not onlthe' other, alpin 16" is placed lin recesses 17 inthe edges-of .the

members, diametrioally opposite -the -key And thus the members are'at allvtim'es held from relative movement.

It Will be readily seen that bydriving the sleeves 121ml from the members Aon both sides of the j'oint they joint may lbe disco'n'-v nected-from'both shafts and maybe at oncej sepa-ratedl intov its lvarious parts,` ',So 'thatlmdw changes .may be quickly: and 'conveniently ,made he' joint may beagain: quickly as-- sembled and `conpled to the shafts. Ixclaim as my invention;- l'

. A shaft couplngl"comprising.tvvo semii05- cylindricalportions forming between. ,them

an opening to receive a'slialftgla sleeve'iitting tightly around said' 'semicylindrical" por- .tions -andfcausing them chimp the' 'shaft adjacent edges'. olf-said seniicylindricalV por.

.rie

site points;l a piu extending transversely l 'In testimony whereof 1 :lllx m'ysgnnture with relation to said members and the shaft, in the presence of two witnesses.

and lying in ce1-tain 'of sid 'recesses' and E R BI M. extending into the shaft; and a pm lymg G O GL J JU mille other i'ecesses -zmd opposite the first W1tnesse`s:

mentioned pin, sald sleeve hold1ng Saud pms EARL C. CARLSON,

:againstlongitndinnl movement. i GEORGE L. CmNDAnL. 

